Notes on Species of Corbiculadce. 83 



nalibus subsequalibus ; lateralibus angustis insequalibus, postico remoto ; 

 epidermido nigro-virescente, nitida vestita ; area posticali rugis irregu- 

 laribus divaricatis corrugata ; mnbonibus parvulis, integris, antice incli- 

 natis, incurvis. 



Long. 60 ; lat. 60 ; diara. 33 mill. 

 Hah. ? Collect. Cuming et Prime. 



The shell is rounded, orbicular, subequilateral, and not much 

 inflated. The anterior side is somewhat produced and rounded, 

 the posterior side is broader and very abrupt. The valves are 

 solid. The color of the interior is white, running into violet on 

 the inferior posterior side and on the margins. The margins 

 are much flattened. The hinge is broad and very much 

 curved. The cardinal teeth are slightly divergent and su.be- 

 qual. The lateral teeth are moderately elongated, somewhat 

 narrow and unequal ; the posterior lateral tooth is situated at 

 a considerable distance from the primaries, and is somewhat 

 rudimentary. The epidermis is dark or blackish green and 

 polished. The folds on the posterior side are coarse and irre- 

 gular. The beaks are small, not denuded, inclined ; they curve 

 inwardly and are approximate. 



This species is very closely allied to Batissa Jay ana from 

 Java; it is, however, more solid, somewhat more inflated, the 

 hinge is much broader, the cardinal teeth are longer and less 

 divergent, the lateral teeth are broader, and the posterior lateral 

 tooth is more rudimentary and less elongated. 



Genus CYEENA. 

 l. Cyrena HerBiai'diiann, Prime. 



Cyrena Bernardiiana, Prime. Acad. IS T . S. Phil. Proc. 126. 1861. 

 Prime Cat. 6. 1863. 



C. testa ovato-transversa, subtrigona, subsequilaterali, tumida, in medio 

 ventricosa ; margine superiore arcuato ; valvis solidis, intus candidis- 

 simis ; cardine angusto, dentibus cardinalibus angustis, majoribus apice 



